The bulk of the car maufacturing worldwide industry uses an OAT based antifreeze as standard fit. It's decades since the problem with EHA was recognised and reformulation to less controversial inhibitors has been going on all the time. EHA has been replaced with sebacate and other organic salts to eliminate the issues that started the Dexcool debarcle. And remember, the issue was underpinned by a history of cooling system neglect by the plaintiffs. Whatever, can you imagine that the Dexcool you can buy today from any Vauxhall outlet is the same stuff? Even the very latest purple antifreeze (so-called environmentally/ecologically friendly/non-toxic and fitted as standard by Volkswagen and others) is an OAT system. The unfortunate thing is very few OAT bottles tell you what's actually inside. If anyone's nervous about that, switch to a green/blue or whatever colour you prefer. The thing is, there's dubious stuff about those you don't know about either.
As for buying OAT, I reckon Euro Car Parts does the best deals and free delivery. The way to find it is search for 'red antifreeze'.
Euro OAT:
http://www.eurocarparts.com/red-anti-freeze
TC